MathematicsChapter 11: Basic Statistics
Frequency Polygon
Plot class mark (mid-value) on the x-axis and frequency on the y-axis.
Learning objectives
- Define and explain frequency polygon.
- Apply frequency polygon to a focused FBISE question.
- Check the answer for correct terms, evidence, working, and units.
Definition
Plot class mark (mid-value) on the x-axis and frequency on the y-axis. Join with straight lines. Two polygons on one grid compare two data sets. Unequal class widths need care: the height must still represent frequency density if the histogram used density.
Where / symbols
- Frequency Polygon
- Plot class mark (mid-value) on the x-axis and frequency on the y-axis. Join with straight lines. Two polygons on one grid compare two data sets. Unequal class widths need care: the height must still represent frequency density if the histogram used density.
Overview
Learn the idea, then use it:
Core Understanding
Plot class mark (mid-value) on the x-axis and frequency on the y-axis. Join with straight lines. Two polygons on one grid compare two data sets. Unequal class widths need care: the height must still represent frequency density if the histogram used density.
Examples class mark vs frequency · compare two sets · polygon joins midpoints · FREQUENCY POLYGON: Plot class mark (mid-value) on the x-axis and frequency on the y-axis. Join with straight lines. Two polygons on one gri
Exam Application
State the correct term, connect it to the chapter rule or evidence, and use a clear example or calculation.
Examples Define first · Show the rule or evidence · Check units, labels, and conclusion
WHAT — FREQUENCY POLYGON
Plot class mark (mid-value) on the x-axis and frequency on the y-axis. Join with straight lines. Two polygons on one grid compare two data sets. Unequal class widths need care: the height must still represent frequency density if the histogram used density.
HOW — Use the idea
Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check the result.
In simple words
Do not merge frequency polygon with a neighbouring idea that uses a different definition, rule, or method.
Key points
- class mark vs frequency
- compare two sets
- polygon joins midpoints
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Frequency Polygon
Sticky Notes · Quick Revision
Core Idea
- Plot class mark (mid-value) on the x-axis and frequency on the y-axis.
Key Points
- class mark vs frequency
- compare two sets
- polygon joins midpoints
Simple Check
- Explain frequency polygon in your own words and connect it to one chapter example.
How to Answer
- Define the idea, show the main rule or evidence, apply it, and check the final statement.
Common Mistake
- Do not merge frequency polygon with a neighbouring idea that uses a different definition, rule, or method.
FBISE Exam Tip
- Use the exact term, show working where needed, and include units or labelled evidence.
60-second revision
- Plot class mark (mid-value) on the x-axis and frequency on the y-axis.
- class mark vs frequency
- compare two sets
- polygon joins midpoints
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